Fig. 2
Risk of bias summary: judgments about each risk of bias item for each included study. Quality evaluation of 31 included studies. +, low risk; −, high risk; ?, unknown
Fig. 2 | Journal of Orthopaedic Surgery and Research
Risk of bias summary: judgments about each risk of bias item for each included study. Quality evaluation of 31 included studies. +, low risk; −, high risk; ?, unknown
Journal of Orthopaedic Surgery and Research